257218076 has 12 divisors (see below), whose sum is σ = 452828208. Its totient is φ = 127838592.

The previous prime is 257218061. The next prime is 257218097. The reversal of 257218076 is 670812752.

It is a super-2 number, since 2×257218076² = 132322277242283552, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191861 + ... + 193196.

It is an arithmetic number, because the mean of its divisors is an integer number (37735684).

Almost surely, 2^257218076 is an apocalyptic number.

It is an amenable number.

257218076 is a deficient number, since it is larger than the sum of its proper divisors (195610132).

257218076 is a wasteful number, since it uses less digits than its factorization.

257218076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385228 (or 385226 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 257218076 is about 16038.0197031928. The cubic root of 257218076 is about 635.9658981227.

The spelling of 257218076 in words is "two hundred fifty-seven million, two hundred eighteen thousand, seventy-six".